60400721 has 2 divisors, whose sum is σ = 60400722. Its totient is φ = 60400720.

The previous prime is 60400709. The next prime is 60400757. The reversal of 60400721 is 12700406.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 59845696 + 555025 = 7736^2 + 745^2 .

It is a cyclic number.

It is not a de Polignac number, because 60400721 - 2¹⁰ = 60399697 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 60400693 and 60400702.

It is not a weakly prime, because it can be changed into another prime (60400621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30200360 + 30200361.

It is an arithmetic number, because the mean of its divisors is an integer number (30200361).

Almost surely, 2^60400721 is an apocalyptic number.

It is an amenable number.

60400721 is a deficient number, since it is larger than the sum of its proper divisors (1).

60400721 is an equidigital number, since it uses as much as digits as its factorization.

60400721 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 336, while the sum is 20.

The square root of 60400721 is about 7771.7900769385. The cubic root of 60400721 is about 392.3563697493.

The spelling of 60400721 in words is "sixty million, four hundred thousand, seven hundred twenty-one".